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By which of the following bonds, a nitrogenous base is linked to the pentose sugar?

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in Biology – Class 12 by (271k points)
By which of the following bonds, a nitrogenous base is linked to the pentose sugar?

(a) Phosphate bond

(b) Ester bond

(c) Peptide bond

(d) N-glycosidic bond

The question was asked in semester exam.

The question is from Molecular Basis of Inheritance in division Molecular Basis of Inheritance of Biology – Class 12

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The correct choice is (d) N-glycosidic bond

Easiest explanation: A nitrogenous base is linked to the pentose sugar by an N-glycosidic bond. As a result of this linkage, a nucleoside is formed. Purine nucleosides have 1’-9 glycosidic linkage and pyrimidine nucleosides have 1’-1 linkage.

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